5.4-stable review patch. If anyone has any objections, please let me know.
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From: Jinjie Ruan ruanjinjie@huawei.com
[ Upstream commit b6cd7adec0cf03f0aefc55676e71dd721cbc71a8 ]
If request_irq() fails in st_rtc_probe(), there is no need to enable the irq, and if it succeeds, disable_irq() after request_irq() still has a time gap in which interrupts can come.
request_irq() with IRQF_NO_AUTOEN flag will disable IRQ auto-enable when request IRQ.
Fixes: b5b2bdfc2893 ("rtc: st: Add new driver for ST's LPC RTC") Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Link: https://lore.kernel.org/r/20240912033727.3013951-1-ruanjinjie@huawei.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/rtc/rtc-st-lpc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c index 2031d042c5e44..d0cfc80342e10 100644 --- a/drivers/rtc/rtc-st-lpc.c +++ b/drivers/rtc/rtc-st-lpc.c @@ -221,15 +221,14 @@ static int st_rtc_probe(struct platform_device *pdev) return -EINVAL; }
- ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, 0, - pdev->name, rtc); + ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, + IRQF_NO_AUTOEN, pdev->name, rtc); if (ret) { dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq); return ret; }
enable_irq_wake(rtc->irq); - disable_irq(rtc->irq);
rtc->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(rtc->clk)) {